How do you solve #-3=log_7x#? Precalculus Solving Exponential and Logarithmic Equations Logarithmic Models 1 Answer Alan P. Nov 25, 2015 #x= 1/343# Explanation: #log_b p = q# means b^q=p# Therefore #log_7 x = -3# means #7^(-3)= x# #x= 1/(7^3) = 1/343# Answer link Related questions What is a logarithmic model? How do I use a logarithmic model to solve applications? What is the advantage of a logarithmic model? How does the Richter scale measure magnitude? What is the range of the Richter scale? How do you solve #9^(x-4)=81#? How do you solve #logx+log(x+15)=2#? How do you solve the equation #2 log4(x + 7)-log4(16) = 2#? How do you solve #2 log x^4 = 16#? How do you solve #2+log_3(2x+5)-log_3x=4#? See all questions in Logarithmic Models Impact of this question 1056 views around the world You can reuse this answer Creative Commons License